Steam saw-mill



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A. J. EMLAW.

STEAM SAW MILL.

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(No Model.) 2 Sheets-Sheet 2.

A. J. EMLAW. STEAM SAW MILL.

No. 248,880. ted Aug. 80,1881.

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NITED STATES PATENT OFFICE.

ANDREW J. EMLAW, OF GRAND HAVEN, MICHIGAN.

STEAM SAW- M I LL.

SPECIFICATION forming part of Letters Patent No. 246,380, dated August30, 1881.

Application tiled September 24, 1880. (No model.)

To all whom it' may concern:

Be it known that I, ANDREW J. EMLAW, of the city of Grand Haven, in thecounty of Ott-awa and State of Michigan, have invented certain new anduseful Improvements in Steam Saw-Mills, of which the following is aspecification.

My invention relates to a steam saw-mill in which the saw-frame isattached directly to and is operated by the piston-rod of thesteamcylinder, the attachment being made at the center of the lower sideof the saw-frame, as shown, and having no other attachment or connectionwith the piston-rod or machinery; and the objects of my invention are,first, to render unnecessary the machinery usually employed inconnecting the saw-frame with the piston-rod second, to give a straightup-anddown stroke or movement tothe saw-frame, preventing the tendencyto a reciprocating` horizontal motion, which is caused where the sidesof the frame are attached by pitmen to the machinery ofthe engine; and,third, to give a straight elastic stroke to lthe saw. I attain theseobjects by the mechanism illustrated in lthe accompanying drawings, inwhich- Figure l is a vertical sectional view of a steam saw-mill throughthe line a' w, showing the hat side of the upright saw; and Fig. 2 is asectional view of the same on the same vertical line, but having itsplane at right angles to the plane shown in Fig. 1.

Similar letters refer to similarparts throughout the several views.

In the drawings, A A represents the frame supporting the several partsof the machine.

S is a saw or a gang of saws, supported by the saw frame or sash WWinthe usual manner. The saw-frame W W is attached from a point at thecenter ot' its lower side in any suitable manner to the piston-rod R.

To the piston-rod R is attached the pistontached to the-saw-frame.

The saw-frame is not connected with any other machinery, and is notveered or drawn from a straight tip-and-down stroke, and the lower endof the piston-rod, which projects below the lower end of the uprightcylinder' C, is connected with and operates the several parts of theengine.

I am aware that other steam saw-mills have the saw-frame worked by thepiston-rod, and I do not broadly claim such device; but I know of nomill in which the saw-frame is operated from the upper end of' thepiston-rod, and the Valve machinery ot' the engine is operated by thelower end ofthe piston-rod, projecting through and below the cylinder,and none in which the saw-frame is not connected by means ot' cranks andpitmen to the machinery operating the valves of the steamchest.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

rEhe combination herein set forth ot' the sawframe W W, piston-rod R, tothe upper end of which said Saw-frame is attached, uprightl cylinderG,crank K, and shaft H, arranged as described, without other interveningmechanism between the valve machinery and the sawframe.

ANDREW J. EMLAW.

Witnesses:

ARTHUR C. DENIsoN, EDWARD TAGGART.

